WO2020202810A1 - Système de cellule secondaire - Google Patents

Système de cellule secondaire Download PDF

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Publication number
WO2020202810A1
WO2020202810A1 PCT/JP2020/005289 JP2020005289W WO2020202810A1 WO 2020202810 A1 WO2020202810 A1 WO 2020202810A1 JP 2020005289 W JP2020005289 W JP 2020005289W WO 2020202810 A1 WO2020202810 A1 WO 2020202810A1
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WO
WIPO (PCT)
Prior art keywords
battery
secondary battery
groups
group
battery system
Prior art date
Application number
PCT/JP2020/005289
Other languages
English (en)
Japanese (ja)
Inventor
耕一 山野上
正好 高橋
大介 槇尾
Original Assignee
株式会社今仙電機製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社今仙電機製作所 filed Critical 株式会社今仙電機製作所
Priority to US17/437,488 priority Critical patent/US20220158461A1/en
Priority to CN202080015252.5A priority patent/CN113454830A/zh
Priority to EP20785378.9A priority patent/EP3951998A4/fr
Publication of WO2020202810A1 publication Critical patent/WO2020202810A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0024—Parallel/serial switching of connection of batteries to charge or load circuit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/22—Balancing the charge of battery modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/08—Three-wire systems; Systems having more than three wires
    • H02J1/082—Plural DC voltage, e.g. DC supply voltage with at least two different DC voltage levels
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the present invention relates to a secondary battery system capable of repeating charging and discharging.
  • the present invention relates to a secondary battery system for mounting on a vehicle or the like to supply high-voltage power.
  • a conventional secondary battery system when supplying electric power with a voltage of 12 V to a vehicle, a conventional secondary battery system is reliable by mounting two battery modules, a secondary battery capable of supplying power at 24 V or higher and a secondary battery capable of supplying power at 12 V. It enhances the sex. That is, a secondary battery at 24 V or higher is used as the primary battery to supply the power required for normal operation, and in the unlikely event that a problem occurs in the secondary battery or generator on the primary side, an emergency power supply is used. Power is supplied from the secondary battery as a vehicle to continue controlling the vehicle. In such a secondary battery system, at present, lead-acid batteries are often used as secondary batteries.
  • Patent Document 1 discloses a technique for providing a highly reliable power supply system for vehicles using a lead storage battery.
  • the vehicle power supply system of Patent Document 1 discloses a configuration in which a hybrid power supply and a lead storage battery are connected in parallel.
  • the hybrid power supply is configured by connecting a secondary battery and a capacitor in parallel, and a power supply control unit controls the power supply between the hybrid power supply and the lead storage battery.
  • Lead-acid batteries are highly stable secondary batteries that can be manufactured from inexpensive materials and can withstand high-current discharge.
  • lead since lead is used for the electrodes, the entire secondary battery system tends to be heavy.
  • the electrolytic solution uses sulfuric acid, it has been pointed out that there is a danger in the event of damage. Therefore, it is required to provide a highly reliable secondary battery system without using a lead storage battery.
  • the present invention has been made in view of the above problems, and it is an object to be solved to provide a highly reliable secondary battery system by multiplexing power sources without using a lead storage battery.
  • the invention according to claim 1 relates to a secondary battery system in which two or more battery groups including a plurality of cells connected in series are provided and each battery group is connected in parallel.
  • the secondary battery system of the present invention is characterized in that an open / close switch for disconnecting each battery group from the circuit of the secondary battery system is arranged.
  • the secondary battery system of the present invention preferably includes an active balancer connected in parallel with the battery group.
  • an open / close switch for disconnecting each battery group from the circuit of the secondary battery system is arranged at a connection portion between each battery group and the active balancer.
  • the secondary battery system according to the present invention has two or more battery groups consisting of a plurality of cells connected in series, and each battery group is connected in parallel.
  • the power supply can be multiplexed by a group of batteries connected in parallel, and the reliability as a secondary battery system is improved.
  • the secondary battery system of the present invention even if a problem occurs in one of a plurality of battery groups connected in parallel, only the defective battery group is separated and retracted by operating the open / close switch. It is possible to continue discharging and charging in the state.
  • the secondary battery system according to the present invention does not require a secondary battery because the power sources are multiplexed. This eliminates the need for lead-acid batteries, which have traditionally been widely used in secondary batteries. By eliminating the need for lead-acid batteries, the weight of the entire secondary battery system can be reduced, and the system can be configured at a lower cost.
  • FIG. 1 is a block diagram schematically showing an outline of a secondary battery system according to an embodiment of the present invention.
  • FIG. 2 is a diagram schematically showing a connection state between a battery group and an active balancer in a secondary battery system according to an embodiment of the present invention.
  • FIG. 3 is a diagram schematically showing a disconnected state of the open / close switch when a problem occurs in one of the battery groups.
  • FIG. 4 is a diagram schematically showing a secondary battery system according to the first embodiment.
  • FIG. 5 is a diagram schematically showing a secondary battery system according to the second embodiment.
  • FIG. 6 is a diagram schematically showing a secondary battery system according to Comparative Example 1.
  • FIG. 7 is a diagram schematically showing a secondary battery system according to Comparative Example 2.
  • FIG. 8 is a diagram showing an example of the configuration of an active balancer preferably used in the present invention.
  • the cell in the present invention is the smallest unit constituting the battery.
  • the cell has a positive electrode, a negative electrode, and an electrolyte filled between the electrodes, and is also called a cell.
  • the battery referred to as a "cell" in this embodiment is a secondary battery that can be charged and discharged.
  • a lithium ion cell, a nickel hydrogen cell, an ELDC cell and the like are known depending on the structure.
  • a lithium ion cell is particularly preferably used.
  • the battery group is a group of two or more cells connected in series.
  • the battery groups those in which cells are particularly combined and integrated and adjusted to have a predetermined voltage and capacity are also referred to as a battery module or an assembled battery.
  • the active balancer is a means for connecting to a plurality of cells, adjusting the charge and discharge states of each cell, and controlling the voltage and capacity in a balanced manner so as to prevent over-discharge and over-charge. is there.
  • the active balancer controls, for example, to temporarily store the electric power of a cell having a large charge state in a capacitor and redistribute it to a cell having a small charge state.
  • FIG. 8 shows a configuration example of an active balancer preferably used in the present invention.
  • the active balancer of FIG. 8 includes a capacitor Cr and a half-bridge circuit for switching. Capacitors are connected to two adjacent cells via a half-bridge circuit.
  • the capacitor Cr can also be connected to the adjacent cell group and the cell group included in the battery group via a half-bridge circuit.
  • the capacitor Cr is alternately switched and connected to one cell and the other cell. At this time, if there is a potential difference between the connected cell and the capacitor, the charge moves from cell to capacitor or from capacitor to cell, and it is automatically uniform so that the potential difference disappears between the cell and the capacitor. Be transformed.
  • a vehicle secondary battery system that supplies electric power with a voltage of 12 V by a secondary battery system 10 capable of outputting 48 V is configured.
  • FIG. 1 is a diagram schematically showing an outline of a secondary battery system 10 connected to a generator 2 and a load 3.
  • the secondary battery system 10 includes a plurality of battery groups 11, 12, and 13 and an active balancer 14 connected in parallel to the battery groups.
  • the battery groups 11, 12, and 13 are connected in parallel with each other.
  • Each of the battery groups 11, 12, and 13 includes a plurality of cells 21 having the same capacity and the same voltage.
  • the plurality of cells 21 are connected in series in the respective battery groups 11, 12, and 13.
  • FIG. 1 shows, as an example, a configuration in which 16 cells connected in series are provided in the battery groups 11, 12, and 13.
  • the battery groups 11, 12, and 13 each have an output voltage of 48V.
  • the output voltage becomes 12 V.
  • power is supplied in parallel from one cell group of each of the battery groups 11, 12, and 13, and as a result, 12 V of electric power is supplied to the load 3.
  • the number of cells to be combined in the battery group and the number of cells arranged in series in the battery group are examples, and the number of combinations and the total number of arrangements are not limited to the form shown in FIG.
  • FIG. 2 is a diagram schematically showing an electrical connection form between the battery groups 11, 12, and 13 in the secondary battery system 10 and the active balancer 14 connected in parallel to the battery group.
  • Open / close switches 31a and 31b for disconnecting the battery group 11 from the secondary battery system are arranged between the battery group 11 and the active balancer 14 when a problem occurs in the battery group 11.
  • open / close switches 32a and 32b are arranged between the battery group 12 and the active balancer 14.
  • Open / close switches 33a and 33b are arranged between the battery group 12 and the active balancer 14.
  • the open / close switch is arranged at the high voltage side of the battery groups 11, 12, 13 and the output point to the load 3 among the electrical connection points between the battery groups 11, 12, 13 and the active balancer 14. It is preferable to do so.
  • an open / close switch for disconnecting the active balancer 14 from the secondary battery is also provided, so that a malfunction of the active balancer 14 can be easily dealt with.
  • FIG. 3 schematically shows a state in which the battery group 11 is disconnected by the open / close switches 31a and 31b when a problem occurs in the battery group 11.
  • the battery group 11 By opening the open / close switches 31a and 31b, the battery group 11 can be disconnected, and the battery groups 12 and 13 can supply electric power to operate the load 3 by continuing to discharge.
  • 12 V of electric power is supplied to the load 3 even after the battery group 11 is disconnected.
  • FIG. 4 shows a circuit diagram of the secondary battery system 40 that embodies the present invention.
  • the secondary battery system 40 of FIG. 4 is charged from the generator 2. Then, the secondary battery system 40 after charging discharges to loads 3 and 5. Electricity is supplied to the load 3 at a voltage of 12 V, and electricity is supplied to the load 5 at a voltage of 48 V.
  • the secondary battery system 40 includes a plurality of battery groups 41, 42, 43 arranged in parallel with each other and an active balancer 44 connected in parallel to the battery groups.
  • Each of the battery groups 41, 42, and 43 includes 16 cells 21 having the same capacity and the same voltage.
  • Each of the cells 21 is combined with four cells as one unit, and output terminals are provided at the ends of each of the four cell groups consisting of the four cells 21.
  • the active balancer 44 is a first balancer 44a that balances two sets of cells that are particularly adjacent to each other in the battery groups 41, 42, 43, and a second balancer 44a that balances the entire battery groups 41, 42, 43. It is composed of the balancer 44b of the above.
  • Open / close switches 51a and 51b are arranged between the battery group 41 and the active balancer 44a in order to disconnect the battery group 41 from the secondary battery system 40 when a problem occurs in the battery group 41. Further, an open / close switch 51c is arranged between the battery group 41 and the active balancer 44b. By opening all the open / close switches 51a, 51b, and 51c, the battery group 41 is separated from the secondary battery system 40.
  • open / close switches 52a, 52b, 52c are arranged to disconnect the battery group 42 from the secondary battery system 40 when a problem occurs in the battery group 42.
  • open / close switches 53a, 53b, 53c are arranged in order to disconnect the battery group 43 from the secondary battery system 40 when a problem occurs in the battery group 43.
  • FIG. 5 shows a circuit diagram of the secondary battery system 60 which is the second embodiment.
  • the difference from the first embodiment is that the DC-DC converter 64 is arranged in parallel with the battery groups 41, 42, 43 instead of the active balancer.
  • the DC-DC converter 64 is an isolated DC-DC converter using a chopper type DC-DC converter or a transformer, and takes out electric power from all the cell groups in the battery group and uses the open / close switches 52a, 52b, 52c. It functions as a circuit that supplies power to the connected battery group and load 3.
  • the DC-DC converter 64 is connected to each of the three terminals of the battery groups 41, 42, and 43. That is, it is connected to the high-voltage side terminal of the battery groups 41, 42, 43, the low-voltage side terminal, and the terminal at the position where the four cell groups in the battery groups 41, 42, 43 are divided into one and three. Has been done. Then, the open / close switch is arranged on the path connected to the high voltage side and on the path connected to the terminal for dividing the cell group. With such a connection form, the voltage adjustment function of the DC-DC converter 64 is equivalent to an active balancer that balances the connected high-voltage side and low-voltage side voltages in the battery groups 41, 42, and 43 at a ratio of 3: 1. Works for.
  • the secondary battery system 60 of this embodiment also disconnects only the defective battery group and discharges it from the other battery groups that operate normally. By doing so, the load can be supplied.
  • FIG. 6 shows a configuration of a conventionally known secondary electronic system 100.
  • a DC-DC converter 102 is connected in parallel with one battery group 101 including a plurality of cells connected in series, and the voltage is adjusted before supplying power to the load. Since the secondary electronic system 100 does not multiplex the power supply, there is a high possibility that the power supply to the load will be stopped if a problem occurs in the battery 101.
  • FIG. 7 shows the configuration of another conventionally known secondary electronic system 110.
  • the secondary electronic system 110 of FIG. 7 has an active balancer 112 connected in parallel with one battery group 111 including a plurality of cells connected in series, and further includes a lead storage battery 113 as a secondary battery.
  • the configuration of the secondary battery system 110 requires a lead storage battery 113 in order to improve reliability.
  • the secondary battery system of the present invention has two or more battery groups consisting of a plurality of cells connected in series, and each battery group is connected in parallel to generate a power source. Multiplexing can be performed, and the reliability as a secondary battery system is improved.
  • the configuration of the secondary battery system described in this embodiment can be changed as appropriate.
  • the number of cells to be connected and the number of cells to be combined can be appropriately changed according to the required output voltage.
  • the number of batteries connected in parallel can be increased to improve reliability.
  • the configurations of the active balancer and the DC-DC converter can also be changed as appropriate.
  • the secondary battery system according to the present invention is suitably mounted on any industrial device as well as a vehicle.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

La présente invention concerne un système de cellule secondaire à haute fiabilité dans lequel une alimentation électrique est multiplexée sans utiliser de batterie de stockage au plomb. Ce système de cellules secondaires (10) comprend au moins deux groupes de batteries comprenant une pluralité de cellules (21) connectées en série, chacun des groupes de batteries (11, 12, 13) étant connecté en parallèle. Dans chaque groupe de batteries (11, 12, 13) se trouvent des commutateurs à ouverture/fermeture (31a, 31b, 32a, 32b, 33a, 33b) qui déconnecte le groupe de batteries d'un circuit du système de cellule secondaire (10). Ce système de cellule secondaire (10) peut comprendre un équilibreur actif (14) connecté en parallèle aux groupes de batteries (11, 12, 13).
PCT/JP2020/005289 2019-04-02 2020-02-12 Système de cellule secondaire WO2020202810A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US17/437,488 US20220158461A1 (en) 2019-04-02 2020-02-12 Secondary Cell System
CN202080015252.5A CN113454830A (zh) 2019-04-02 2020-02-12 二次电芯系统
EP20785378.9A EP3951998A4 (fr) 2019-04-02 2020-02-12 Système de cellule secondaire

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-070526 2019-04-02
JP2019070526A JP7323745B2 (ja) 2019-04-02 2019-04-02 二次電池システム

Publications (1)

Publication Number Publication Date
WO2020202810A1 true WO2020202810A1 (fr) 2020-10-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/005289 WO2020202810A1 (fr) 2019-04-02 2020-02-12 Système de cellule secondaire

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Country Link
US (1) US20220158461A1 (fr)
EP (1) EP3951998A4 (fr)
JP (1) JP7323745B2 (fr)
CN (1) CN113454830A (fr)
WO (1) WO2020202810A1 (fr)

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JP2014073051A (ja) * 2012-10-01 2014-04-21 Toyota Industries Corp 電源装置および電池モジュール切り替え方法
WO2015001703A1 (fr) * 2013-07-03 2015-01-08 ソニー株式会社 Dispositif de stockage électrique et procédé de commande de dispositif de stockage électrique
WO2015015743A1 (fr) 2013-07-31 2015-02-05 三洋電機株式会社 Système de source d'alimentation pour véhicule

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JP4244531B2 (ja) * 2001-05-11 2009-03-25 株式会社デンソー 複数電圧出力型車両用電源装置の制御方法
JP2011072153A (ja) * 2009-09-28 2011-04-07 Sanyo Electric Co Ltd 車両用電源装置及びこれを備える車両並びに車両用電源装置の容量均等化方法
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JP5143185B2 (ja) * 2010-02-08 2013-02-13 三洋電機株式会社 電源装置
TWI431896B (zh) * 2011-04-15 2014-03-21 Simplo Technology Co Ltd 電池平衡電路與其平衡方法與電池模組活化方法
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JP2013219994A (ja) * 2012-04-12 2013-10-24 Toyota Industries Corp 電池均等化装置および方法
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JP2015122864A (ja) * 2013-12-24 2015-07-02 株式会社豊田自動織機 リレーの異常検出方法
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JP6802723B2 (ja) * 2017-01-31 2020-12-16 株式会社デンソーテン 蓄電装置および蓄電制御方法
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JP2014073051A (ja) * 2012-10-01 2014-04-21 Toyota Industries Corp 電源装置および電池モジュール切り替え方法
WO2015001703A1 (fr) * 2013-07-03 2015-01-08 ソニー株式会社 Dispositif de stockage électrique et procédé de commande de dispositif de stockage électrique
WO2015015743A1 (fr) 2013-07-31 2015-02-05 三洋電機株式会社 Système de source d'alimentation pour véhicule

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Title
See also references of EP3951998A4

Also Published As

Publication number Publication date
US20220158461A1 (en) 2022-05-19
JP2020171107A (ja) 2020-10-15
JP7323745B2 (ja) 2023-08-09
EP3951998A4 (fr) 2022-12-14
CN113454830A (zh) 2021-09-28
EP3951998A1 (fr) 2022-02-09

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